<template>
  <div>
    <!-- 评论列表 -->

     <div class="cmt-list">
<van-list
  v-model="loading"
  :finished="finished"
  finished-text="没有更多了"
  @load="onLoad"
  offset="50"
  :immediate-check="false"
>
      <!-- 评论的 Item 项 -->
      <div class="cmt-item" v-for="obj in commentlist" :key="obj.com_id">
        <!-- 头部区域 -->
        <div class="cmt-header">
          <!-- 头部左侧 -->
          <div class="cmt-header-left">
            <img :src="obj.aut_photo" alt="" class="avatar">
            <span class="uname">{{obj.aut_name}}</span>
          </div>
          <!-- 头部右侧 -->
          <div class="cmt-header-right">
            <van-icon name="like" size="0.42666rem" color="red" v-if="obj.is_liking" @click="likecom(true,obj)"/>
            <van-icon name="like-o" size="0.42666rem" color="gray" v-else @click="likecom(false,obj)"/>
          </div>
        </div>
        <!-- 主体区域 -->
        <div class="cmt-body">
          {{obj.content}}
        </div>
        <!-- 尾部区域 -->
        <div class="cmt-footer">{{obj.pubdate}}</div>
      </div>

</van-list>
 </div>
    <!-- 底部添加评论区域 - 1 -->
<div class="add-cmt-box van-hairline--top" v-if="iswrite">
    <van-icon name="arrow-left" size="0.48rem" @click="$router.back()" />
    <div class="ipt-cmt-div" @click="togglewrite">发表评论</div>
    <div class="icon-box">
        <van-badge :content="allcount" max="99">
            <van-icon name="comment-o" size="0.533333rem" @click="scollto"/>
        </van-badge>
        <van-icon name="star-o" size="0.533333rem" />
        <van-icon name="share-o" size="0.533333rem" />
    </div>
</div>

<!-- 底部添加评论区域 - 2 -->
<div class="cmt-box van-hairline--top" v-else >
    <textarea placeholder="友善评论、理性发言、阳光心灵" @blur="blurfn" v-iptfocus
    v-model.trim="txmessage"></textarea>
    <van-button type="default" :disabled="txmessage.length===0"
    @click="sendcomment">发布</van-button>
</div>
  </div>
</template>

<script>
import { likecommentAPI, dislikecommentAPI, getcommentlistAPI, sendcommentAPI } from '@/api'
import { getTime } from '@/utils/datetime.js'
export default {
  props: {
    artId: {
      type: [Array, String],
      required: true
    }
  },
  data () {
    return {
      commentlist: [],
      iswrite: true,
      allcount: 0,
      txmessage: '',
      lastId: null,
      loading: false,
      finished: false
    }
  },

  async created () {
    // 获取评论列表
    this.getcommentlist()

    // dot 会显示小红点,但是想要不显示
  },

  methods: {
    getTime,
    onLoad () {
      if (this.commentlist.length > 0) { // 判断请求数据的长度不为0
        this.getcommentlist()// 防止:immediate-check不生效
        // console.log(this.commentlist)
      }
    },
    async getcommentlist () {
      const res1 = await getcommentlistAPI({ artid: this.artId, offest: this.lastId })
      if (res1.data.data.results.length === 0) {
        this.finished = true
        return
      }
      //   console.log(res1.data.data.results)
      this.lastId = res1.data.data.last_id
      //   console.log(this.lastId)
      res1.data.data.results.forEach((obj) => {
        obj.pubdate = this.getTime(obj.pubdate)
      })
      this.commentlist = [...this.commentlist, ...res1.data.data.results]
      this.allcount = res1.data.data.total_count || ''
      this.loading = false
    },
    //   喜欢不喜欢is_liking 是false 不喜欢  页面显示灰心
    async likecom (bool, obj) {
      if (bool === true) {
        // 点击的是红心 要取消 不喜欢 调不喜欢接口 灰心显示
        obj.is_liking = false

        await dislikecommentAPI({ id: obj.com_id })
      } else {
        // 点击的是灰心,要喜欢,调喜欢的接口
        obj.is_liking = true

        await likecommentAPI({ target: obj.com_id })
      }
    },
    togglewrite () {
      // 点击的时候显示要编写评论 失去焦点的时候回归到true
      this.iswrite = false
    },
    scollto () {
      document.querySelector('.like-box').scrollIntoView({ behavior: 'smooth' })// 点击滚动到评论
    },
    blurfn () {
      setTimeout(() => {
        this.iswrite = true
      })
    },
    async sendcomment () {
      // 点击发布,将提交到评论列表
      const res = await sendcommentAPI({ target: this.artId, content: this.txmessage })
      const newobj = res.data.data.new_obj
      this.commentlist.unshift(newobj)
      this.allcount++
    }
  }
}
</script>

<style scoped lang="less">
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.art-cmt-container-1 {
  padding-bottom: 46px;
}
.art-cmt-container-2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
</style>
